Why aren't you confident? It sounds like your preparation is more than enough
Make yourself some flash cards and practice.
Note where you're making mistakes - then study those specific topics.
And try and answer questions here.
Get a working SAS environment, if you don't have one available from your employer or university/school, get SAS University Edition.
Then use that to answer questions here (you don't need to post your answers, just try to solve problems), and to replay answers given by others, and see if you "get" what's happening.
Learning by doing has always worked best for me.
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Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
Find more tutorials on the SAS Users YouTube channel.